var popupWindow;function popup(b,c,a){var e=screen.width/2-c/2;var d=screen.height/2-a/2;if(popupWindow==null||popupWindow.closed){popupWindow=window.open(b,"","toolbar=0, scrollbars = 1, directories=0, status=0, menubar=0, location=0, resizable=0, width="+c+", height="+a+", left="+e+", top="+d)}popupWindow.location=b;popupWindow.focus();return false};